Diff: easy-connect/stm-spirit1-rf-driver/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Aes.c

Revision:

0:24d3eb812fd4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/easy-connect/stm-spirit1-rf-driver/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Aes.c	Wed Sep 05 14:28:24 2018 +0000
@@ -0,0 +1,319 @@
+/**
+  ******************************************************************************
+ * @file    SPIRIT_Aes.c
+  * @author  VMA division - AMS
+  * @version 3.2.2
+  * @date    08-July-2015
+ * @brief   Configuration and management of SPIRIT AES Engine.
+ *
+  * @attention
+ *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+ */
+
+
+/* Includes ------------------------------------------------------------------*/
+#include "SPIRIT_Aes.h"
+#include "MCU_Interface.h"
+
+
+/**
+ * @addtogroup SPIRIT_Libraries
+ * @{
+ */
+
+
+/**
+ * @addtogroup SPIRIT_Aes
+ * @{
+ */
+
+
+/**
+ * @defgroup Aes_Private_TypesDefinitions       AES Private Types Definitions
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Defines                AES Private Defines
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Macros                 AES Private Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Variables              AES Private Variables
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_FunctionPrototypes     AES Private Function Prototypes
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Functions              AES Private Functions
+ * @{
+ */
+
+
+/**
+ * @brief  Enables or Disables the AES engine.
+ * @param  xNewState new state for AES engine.
+ *         This parameter can be: S_ENABLE or S_DISABLE.
+ * @retval None
+ */
+void SpiritAesMode(SpiritFunctionalState xNewState)
+{
+  uint8_t tempRegValue = 0x00;
+
+  /* Check the parameters */
+  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
+
+  /* Modifies the register value */
+  g_xStatus = SpiritSpiReadRegisters(ANA_FUNC_CONF0_BASE, 1, &tempRegValue);
+  if(xNewState == S_ENABLE)
+  {
+    tempRegValue |= AES_MASK;
+  }
+  else
+  {
+    tempRegValue &= ~AES_MASK;
+  }
+
+  /* Writes the ANA_FUNC_CONF0 register to enable or disable the AES engine */
+  g_xStatus = SpiritSpiWriteRegisters(ANA_FUNC_CONF0_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief  Writes the data to encrypt or decrypt, or the encryption key for the 
+ *         derive decryption key operation into the AES_DATA_IN registers.
+ * @param  pcBufferDataIn pointer to the user data buffer. The first byte of the array
+ * 	   shall be the MSB byte and it will be put in the AES_DATA_IN[0] register, while
+ * 	   the last one shall be the LSB and it will be put in the AES_DATA_IN[cDataLength-1]
+ * 	   register. If data to write are less than 16 bytes the remaining AES_DATA_IN registers
+ * 	   will be filled with bytes equal to 0. This parameter is an uint8_t*.
+ * @param  cDataLength length of data in bytes.
+ *         This parameter is an uint8_t.
+ * @retval None
+ */
+void SpiritAesWriteDataIn(uint8_t* pcBufferDataIn, uint8_t cDataLength)
+{
+  uint8_t i, dataInArray[16];
+
+  /* Verifies that there are no more than 16 bytes */
+  (cDataLength>16) ? (cDataLength=16) : cDataLength;
+
+  /* Fill the dataInArray with the data buffer, using padding */
+  for(i=0;i<16;i++)
+  {
+    (i<(16 - cDataLength)) ? (dataInArray[i]=0):(dataInArray[i]=pcBufferDataIn[15-i]);
+
+  }
+
+  /* Writes the AES_DATA_IN registers */
+  g_xStatus = SpiritSpiWriteRegisters(AES_DATA_IN_15_BASE, 16, dataInArray);
+
+}
+
+
+/**
+ * @brief  Returns the encrypted or decrypted data or the decription key from the AES_DATA_OUT register.
+ * @param  pcBufferDataOut pointer to the user data buffer. The AES_DATA_OUT[0]
+ *         register value will be put as first element of the buffer (MSB), while the
+ *         AES_DAT_OUT[cDataLength-1] register value will be put as last element of the buffer (LSB).
+ * 	   This parameter is a uint8_t*.
+ * @param  cDataLength length of data to read in bytes.
+ *         This parameter is a uint8_t.
+ * @retval None
+ */
+void SpiritAesReadDataOut(uint8_t* pcBufferDataOut, uint8_t cDataLength)
+{
+  uint8_t address, dataOutArray[16];
+
+  /* Verifies that there are no more than 16 bytes */
+  (cDataLength>16) ? (cDataLength=16) : cDataLength;
+
+  /* Evaluates the address of AES_DATA_OUT from which start to read */
+  address = AES_DATA_OUT_15_BASE+16-cDataLength;
+
+  /* Reads the exact number of AES_DATA_OUT registers */
+  g_xStatus = (SpiritSpiReadRegisters(address, cDataLength, dataOutArray));
+
+  /* Copy in the user buffer the read values changing the order */
+  for(int i = (cDataLength-1); i>=0; i--)
+  {
+    *pcBufferDataOut = dataOutArray[i];
+    pcBufferDataOut++;
+  }
+
+}
+
+
+/**
+ * @brief  Writes the encryption key into the AES_KEY_IN register.
+ * @param  pcKey pointer to the buffer of 4 words containing the AES key.
+ *         The first byte of the buffer shall be the most significant byte AES_KEY_0 of the AES key.
+ *         The last byte of the buffer shall be the less significant byte AES_KEY_15 of the AES key.
+ * 	   This parameter is an uint8_t*.
+ * @retval None
+ */
+void SpiritAesWriteKey(uint8_t* pcKey)
+{
+  uint8_t pcTempKey[16]; 
+  for (uint8_t i = 0; i < 16; i++)
+  {
+    pcTempKey[15-i] = pcKey[i];
+  }
+  
+  /* Writes the AES_DATA_IN registers */
+  g_xStatus = SpiritSpiWriteRegisters(AES_KEY_IN_15_BASE, 16, pcTempKey);
+
+}
+
+/**
+ * @brief  Returns the encryption/decryption key from the AES_KEY_IN register.
+ * @param  pcKey  pointer to the buffer of 4 words (16 bytes) containing the AES key.
+ *         The first byte of the buffer shall be the most significant byte AES_KEY_0 of the AES key.
+ *         The last byte of the buffer shall be the less significant byte AES_KEY_15 of the AES key.
+ *         This parameter is an uint8_t*.
+ * @retval None
+ */
+void SpiritAesReadKey(uint8_t* pcKey)
+{
+  uint8_t pcTempKey[16];
+
+  /* Reads the AES_DATA_IN registers */
+  g_xStatus = SpiritSpiReadRegisters(AES_KEY_IN_15_BASE, 16, pcTempKey);
+
+
+  for (uint8_t i = 0; i < 16; i++)
+    pcKey[i] = pcTempKey[15-i];
+
+}
+
+
+
+/**
+ * @brief  Derives the decryption key from a given encryption key.
+ * @param  None.
+ * @retval None.
+ */
+void SpiritAesDeriveDecKeyFromEnc(void)
+{
+  /* Sends the COMMAND_AES_KEY command */
+  g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_KEY);
+
+}
+
+
+/**
+ * @brief  Executes the encryption operation.
+ * @param  None.
+ * @retval None.
+ */
+void SpiritAesExecuteEncryption(void)
+{
+  /* Sends the COMMAND_AES_ENC command */
+  g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_ENC);
+
+}
+
+
+/**
+ * @brief  Executes the decryption operation.
+ * @param  None.
+ * @retval None.
+ */
+void SpiritAesExecuteDecryption(void)
+{
+  /* Sends the COMMAND_AES_DEC command */
+  g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_DEC);
+
+}
+
+
+/**
+ * @brief  Executes the key derivation and the decryption operation.
+ * @param  None.
+ * @retval None.
+ */
+void SpiritAesDeriveDecKeyExecuteDec(void)
+{
+  /* Sends the COMMAND_AES_KEY_DEC command */
+  g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_KEY_DEC);
+
+}
+
+
+/**
+ * @}
+ */
+
+
+/**
+ * @}
+ */
+
+
+/**
+ * @}
+ */
+
+
+
+/******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/